I am using the FLTK library in Visual Studio Community 2019 and building my application for x86 works fine. Now, I would like to build it for x64. However, I am getting the error "Cannot open include file: 'dirent.h': No such file or directory.".

The error occurs in the file, named 'filename.H'. This header file comes with the FLTK library.

Has anyone an idea how I could fix this problem?

Update:

The dirent.h library is not recognized, because its an C POSIX library, as described in the link here below. However, the question still remains, namely, how can I fix this problem?

<dirent.h> in visual studio 2010 or 2008

The link above refers to a link with an alternative dirent.h file. I've tried to include this file in my project, however, now another errors occur. These errors occur in the file Fl_Native_File_Chooser.H. The type specifiers fl_OPENFILENAMEW and fl_BROWSEINFOW are unknown in this file.